Furnace.



W. J. KENNEY.

FURNACE.

APPLIOATION FILED MAR.13, 1911.

Patented Oct. 20, 1914.

4 SHEETS-811E151 1.

VJ lfrz zzey r g t I W NESSES W. J. KENNEY. FURNACE. APPLICATION FILED MAR. 13, 1:111.

1,1 14,269, Patented Oct. 20, 1914.

4 SHEETS BHEET 2.

W. J. KENNEY.

FURNACE.

APPLICATION FILED MAB.134 191;.

1 1 1 4,269, Paris: ms. ms. 2), 191i W. J. KENNEY.

FURNACE.

APPLICATION FILED MAB..13, 1911.-

1,1 14,269. Patented Oct. 20, 1914.

4 BEBETS-8EEET 4.

marrnn sirairas PATENT onnion.

WILLIAM JOHN KENNEYY, or WILMETTE, rumors, assrenoa T0 onnnnrnnn s'roxna- COMPANY or AMERICA, or car-cries, rumors, A coaroaa'rxon OF NEW mess FURNACE.

Specification of Letters Patent.

Patented oaizaj1jtia;

Application filed March 13, 1911. Serial No. 614,056.

T all whom it may concern v Be it known that I, IVILLIAM J. KENNEY, a citizen of the United States, residing at l-Vilmette, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Furnaces, and declare the following to be a full, clear, and exact descrip tion of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to furnaces and more particularly to automatic stoking mechanism and has, for its primary object, to provide means for effectively clearing the furnace of clinkers and ashes without wasting unconsumed fuel.

The various features of novelty whereby my invention is characterized will hereinafter be pointed out with particularity in the claims; but for a full understanding of my invention and its various objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawings, wherein Figure 1 is a longitudinal vertical section taken through a furnace arranged in accordance withapreferred form of my invention; Fig. 2 is a transverse vertical section through the furnace; Fig. 3 is a horizontal section taken directly above the retort, the dead-plates at one side of the retort being omitted for the purpose of showing the underlying parts; Fig. 4 is a side elevation of the cleaning mechanism detached from the furnace, the parts occupying different positions from those indicated in- Fig. 1; Fig. 5 is aside view on an en larged scale of the detachable driving con- I nection for the dumping mechanism; and

Fig. 6 is a section on line 66 of Fig." 5.

In the drawings, I have illustrated my invention as applied to an automatic underfeed stoker of the type disclosed in the Ken- 'ney and Grohn application, Serial No.

actuating terms employed in the definitions ofmy "iii \"ention, constituting the appended 'c lainis Referring to the dra\vi-ngs,=l-designa furnace of any suitable orusixalconstru tion. Extending longitudinally along tl center of the furnaceis a retort The tort is shorter than the furnace"'so asto leave room for the mouthof an outlet 'pa sage 3 between the rear end of thertdrt" and the rear wall of the furnace Belo 77 the discharge passage-is an ash chute Fuel is supplied to the'retortby means suitable charging mechanism 5. Between the sides of the retortand the side wall "ofthe furnace, are dead-plates 6 and 7;

In accordance with one feature" off myj rention. I mount upon the dead plate's seW oral longitudinal series of blocks or dogs-"8, which lie within openings 9 in "the dead plates and are pirotally supported insuclri, a manner that-tile) may be swungf'r'orri' 2*?5 position wherein they lie below the topsurfi faces of the deadplates" into alpos'itio wherein portions thereof project above-the dead-plates. The noses of the"'-d0gs,--1 0 which are adapted to project abo've t-hd to clinkers are broken up, and the 5link rjai1d s5 ashes are. fed toward the rear' of the furnaceand are discharged into the passage 3: The dogs may be actuated in" any s'uitablefin ner. In the arrangement Ishown, each?se ries of dogs-that is, each row extendin longitudinally of the furnace -is connected together by a rod or link 12- A, hor-izonti'tl shaft 13 passes transversely through the furnace beneath the rtortf andi; is oscillated by means'of a SuitaliIepoWer QS device 1 1. The links 12 are connected -to;

crank-arms 15 and 16, rigidly secured-to ithe shaft 13. Consequently, as theshaftfis o {a cillated,- the members 12 are "reciprocate and the dogs are oscillated about -s their "1 00 pivots, alternately rising above and drop?" ping below the upper surfaces of the -i dead plates. 1 w' f In accordance with thesecond fentlilffl'fi my invention, I providemeans for contro lw1 05 ling the final discharge of the CIinkel'S-Jafidfl ashes. In the preferred arrangement; =11 mount movable perforated supporting plate 17 across the lower end of the passage 3. When the supporting plate is in the position indicated in Fig. 1, the clinkers and ashes may pile up thereon, free air passing up through the perforations and completing the combustion of any small quantities of partially consumed fuel which may have been discharged from the retort and deadplates.

I prefer to make the passage 3 quite long so as to. bring the supporting plate considerably below the surface of the fuel-supporting bed; thus leaving room for a substantial column of clinkers and ashes ready to drop into the receiving chute. In connection with the long outlet passage I sometimes prefer to use means for discharging the column of clinkers and ashes a little at a time, thus causing the clinkers and ashes to descend gradually and rest directly on the perforated supporting plate before being finally discharged. To this end I associate with the supporting plate h discharging trough. or receptacle 18, this lying below the supporting plate andiha'ving one of its side edges joined to one edge of the plate. The combined supporting and dumping member is mounted ona horizontal shaft 19 extending along the bottom of the trough. When the parts are in the position shown in Fig. 1, the trough is in its du ing position so that any matter which may ave been contained therein-will have dropped into the discharge chute,= When the shaft is oscillated in the counter-clockwise direction, as Viewed in Fig. 1, the supporting plate passes forwardly out of the passage 3 and the trough 18 takes its placeacross the passage. The clinkers and ashes contained in the passage now. drop into the trough and, by returning the parts to the osition's indicated in F ig. 1, a section of t e column of clinkers and ashes, lying in the: assage 3, is cut from the lower end thereof and is dumped into the discharge chute By this arrangement, the passage 3, when full, will not .be emptied by a single operation of the dumping mechanism, but will require several-operations. Consequently, any small quantities of unconsumed. fuel within the passage are always given the chance to lie, for a time, upon the perforated supporting plate and be consumed by air passing upwardly through the perforations.

The dumping mechanism may be actuated in anysuitable way, manuall or by power, it being only necessary to oscillate the shaft 19 on which the dumping devices are mounted. Intliearrangement illustrated, I have shown means for operating the dumping mechanism by power when andas desired. To this end I provide the shaft 19 with a crank arm20at'one end, a connecting rod 21 extendnig'forward from the crank arm to apointjn proximity to the outen end of arm 22 fixed to the main shaft 13. On the arm 22 is apin 23 and on the under side of V in the dead plates. When the connecting rod is lifted, freeing it from the pin 23, the driving connection between the main shaft and the dumping mechanism is interrupted and the dumping mechanism remains stationary. Consequently the dumping mechanism may be actuated whenever desired and for any desired length of time, remaining stationary at other times and allowing the clinkers and ashes to pile up on the supporting plate. For controlling the connecting rod 21 I have provided a rock shaft 25 pivoted to a fixed support adjacent to the connecting rod and having an arm 26 underlying the same. In one position of the rock shaft it holds the connecting rod raised clear of the pin'23, while in its other position it allows the connecting rod to drop far enough to bring the notch 24 over the pin and thus complete the driving connection for the dumping mechanism.

It will be seen that the retort and the dead plates divide the furnace into an upper combustion chamber and a lower air chamber. Air is introduced into the air chamber through a suitable blower 27 and passes up through the usual twyer blocks 28 placed around the upper edge of the retort. The fuel is fed into the retort, burning in the liberating zone at the top of the retort, and being discharged upon the dead plates in the form'of clinker and ash containing some unconsumed fuel. As the dogs 8 are oscillated, the clinkers are broken up and broken away from the twyer blocks, and the whole mass is gradually fed toward the rear end of the furnace. When the clinkers and ashes reach the rear end of the furnace they drop into the discharge passage and upon the perforated supportin plate, forming a column .of hot material w ich will continue to burn in the air supplied from below if there happens to be any combustible matter leftv among the clinkers and ashes. The dead'plates are practically imperforate except for the small passages around the oscillatory dogs. Consequently the incoming air extracts heat from the dead plates, raising its own temperature and keeping the dead plates comparatively-cool; so that the air assing into the combustion chamber throng the twyer blocks is'already warm and improves the combustion.

The driving means for the mechanism which moves the clinkers and ashes toward the rear of the furnace may be regulated so 130 as to produce any desired speed of travel in the moving mass, while the dumping or discharging mechanism which makes the final disposition of the clinkers and ashes may be controlled independently of the other mechanism so as not to be required to operate according to any fixed constant determined by the other mechanism.

It will thus be seen that I have produced a simple and eilicient mechanism for positively clearing a furnace of clinkers and ashes, sufiicient flexibility of operation being afl'orded to insure the attainment of the best working condition in all cases.

I claim:

1. In combination, a furnace, a retort within the furnace, stationary dead plates arranged at the sides of the retort and with the latter dividing the furnace into an upper combustion chamber and a lower air chamber, dogs mounted on said dead plates and adapted to move upwardly and rearwardly, means for actuating said dogs, means for delivering fuel to the retort, and means for introducing air into the air chamber, there being passages from the air chamber to the combustion chamber at the sides of the retort.

2. In combination in a stoker, a retort, twyer blocks arranged around the top of the retort, stationary dead plates arranged about the retort outside of the twyer blocks near the top of the retort, means for feeding fuel into said retort, dogs mount-ed on said dead plates and adapted to move upwardly and rearwardly to carry the clinkers and ashes toward the rear of the retort, and means for actuating said dogs.

3. In combination, a furnace, a retort within the furnace, stationary dead plates arranged at the sides of the retort and cooperating therewith to divide the furnace into an upper combustion chamber and a lower air chamber, there being a discharge passage for clinkers and ashes at one end of the retort, dogs mounted on said dead plates and movable upwardly and longitudinally to carry the clinkers and ashes toward said' passage, means for actuating said dogs, means for delivering fuel to the retort, and means for admitting air into said air chamber, there being passages leading from said air chamber to the combustion chamber at the sides of the retort.

4. In combination, a furnace, a retort Within the furnace, means between the sides of the retort and the side walls of the furnace for moving clinkers and ashes toward one end of the furnace, there being a discharge passage for clinkers and ashes adjacent to the retort at'said end of the furnace, said means forming with the retort a member dividing the furnace into an upper combustion chamber and a lower air chamber, there being passages leading from said air chamber to the combustion chamber at the sides of the retort, means for introducing air under pressure into said air chamber, and means located in said passage at a considerable distance below the top of the retort for periodically removing only the lowermost portion of the clinkers and ashes in said passage, the la st mentioned means being perforated to permit air to flow up through-the body of clinkers and ashes in said passage.

5. In combination, a furnace, a retort with: in the furnace, stationary dead plates arranged at the sides of the retort and cooperating therewith to divide the furnace into an upper combustion chamber and a lower air chamber, there being a discharge passage for clinkers and ashes in the furnace adjacent to one end of the retort, dogs mounted on said dead plates so as to be movable upwardly and longitudinally of the retort so as to move the clinkers and ashes toward said passage, a dumping plate extending across said assage, .a common operating means for said dogs and said plate, means for delivering fuel to the retort, and means for deliverin air into said chamber.

6. In combination in a stoker, a retort, stationary dead plates arranged at the sides of the retort for receiving clinkers and ashes therefrom, movable dogs mounted on said dead plates for carrying the clinkers and ashes toward one end of the retort, a rock shaft extending transversely beneath the retort and the dead plates, a connection between said rock shaft and said dogs, a power device for actuating said rock shaft, and an independent power device for delivering fuel to the retort.

In testimony whereof, I sign this specification in the presence of two witnesses.

WILLIAM JOHN KENNEY. W'itnesses:

MARGARET FALAHEE, ETTA CHAMBERLIN. 

